It is considered thatthevolcanic systemcontinues to evolve.No new eventsthat may indicatean acceleration of theprocess, involvinggreater instabilityof itrequiresthechangesin activity level.Whilethe instability of thevolcanolastedfor over fiveyears, it isessential not toget used to aseeminglymonotonousbehaviorof the volcano andmonitoring officialinformationthat may be publishedby theColombianGeologicalService.

Source : SGC.

Momotombo / Telica , Nicaragua :

Explosion at Momotombo volcano, Nicaragua

15 FEBRUARY 2016. An explosion occurred at 1:04 pm in the Momotombo volcano on Monday 15 February, as reported by the Nicaraguan Institute of Territorial Studies (INETER).

The explosion lasted until 1:12 pm. Seen in real-time on webcams showing that Momotombo volcano expelled gases and ash.

On Sunday, the authorities of the National System for Prevention, Mitigation and Attention to Disasters (SINAPRED) expressed concern about the seismic activity in the Cerro Negro.

On Saturday February 13 , the Telica volcano experienced an explosion with expulsion of gases and ash, officials said.

Rosario Murillo, coordinator of communication and citizenship, during his daily official media report, said that the Momotombo registered high emission also added that US experts have arrived in the country to study the volcanoes that are currently recording activity.

15 FEBRUARY 2016. Authorities in Nicaragua activated emergency plans after explosions occurred at both the Momotombo and Telica volcanoes on Saturday. Meanwhile, the Masaya volcano has also witnessed an increase in seismic activity in recent days.According to the Nicaraguan Institute of Territorial Studies (INETER), the Telica volcano, located in the Leon department, erupted at 8:28 a.m. Saturday morning, launching a column of ash and gas some 1,000 meters (3,280 feet) into the air. At least 20 smaller eruptions were recorded at the volcano in the subsequent hours. Ashfall was reported in some nearby communities.

About two hours after the first explosion at Telica, the Momotombo volcano – which had been essentially dormant for 100 years before exploding to life in December – launched a column of ash and gas more than 1,600 feet (500 meters) into the air.There were no injuries reported in either event, though Civil Defense and municipal authorities said they were activating emergency plans in order to provide a rapid response should communities become at risk. Civil Defense authorities also visited communities near the Momotombo to coordinate evacuation routes should a major incident occur.

Sources :La Prensa. Costa Rica star.

Photo :Ineter.

Cotopaxi , Equateur :

On January 26, 2016, with the logistical support of an aircraft of MICS, a survey was held from Tababela airport to the Cotopaxi volcano with a Twin Otter aircraft FAE (452), commanded by Captain Urquizo, following the path shown in Figure 1

Visual observations:The conditions under whichtheflight took placewere very favorable,becausethe volcanowas completelyuncovered andon the other hand, the highcloud coverremainedon the volcanomost of the time,so there wasnosolarradiation effecton the volcanoforthermal imaging.During the approachthe volcano,it was observedthat the crateremittedasmallcolumnofwater vapor,pulsating, whichmostlyremainedwithinthe crater,sometimesnot exceedingmore than 500metersover welltop andfinallymoving tothewest (Fig.2).

On the uppereast side,it was observedthat theglacierareahas experienced rapidmelting,which ledthe fallof materialsdepositedon thetop to thelower glacier, whichthereforenow has adark color.It should be notedthat this materialwas not presentbefore,during observationsof the flightof December 15,theash fallhas notoccurred in thisregionof the volcano(Fig.4).

Figure 4:EastsideofGlacier;melting glaciersfrom the top edgeof the cratercausesdetachment ofrock materialon the lowerglacier, so itappears dark.(Photo:P.RamónIG /EPN).

As regards fields fumarole it was determined that the TMA values ​​are mostly similar or lower than those measured on 15 January, except for slightly higher values ​​measured on the south side, inner crater Anillo Arena Internal , Yanasacha, Glacier Circular , low Fumarola from North Summit. Contrary to what was observed at the end of September 2015, the fumaroles activity in most areas no longer generates precipitation of mineral deposition and possibly sulfur (greenish).During this overview again, it was possible to identify thermal anomalies in areas were deposited materials of the upper parts of the outer crater reworked, particularly on the east and southeast flanks. These areas have reached a TMA value of 14.7 ° C. It should be noted that the entire upper half of the glacier is covered by these products, helping the melting process on the glacier, decreasing albedo ..